gpio: use dev_get_platdata()

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-adp5520.c b/drivers/gpio/gpio-adp5520.c
index f33f78d..084337d 100644
--- a/drivers/gpio/gpio-adp5520.c
+++ b/drivers/gpio/gpio-adp5520.c
@@ -89,7 +89,7 @@
 
 static int adp5520_gpio_probe(struct platform_device *pdev)
 {
-	struct adp5520_gpio_platform_data *pdata = pdev->dev.platform_data;
+	struct adp5520_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct adp5520_gpio *dev;
 	struct gpio_chip *gc;
 	int ret, i, gpios;